Would love a citation on this one. Forcing above average American students into cram schools to memorize leetcode problems would probably help make Americans “the best candidates” for the whiteboard merry-go-round, but I have a strange feeling interviews would start morphing again if that happened.

American students are very reluctant to study stem compared to most rich countries so USA wouldn't be able to compete with the rest of the world without importing talent.

So the choice is to let companies import talent or see them move to another country.

They're already outsourcing the jobs to other countries because of cost regardless of talent level.

If the US did away with the H1B visa entirely, companies here would hire people they would have previously overlooked and train them to be as competent as what they would have hired abroad.

Facebook already trains people, they hire a ton of inexperienced people every year and train them to become software engineers. All they require is that you are smart/hard working enough to pass their tests.